<?php
/**
 * Created by PhpStorm.
 * User: 颖inv
 * Date: 2016/9/27
 * Time: 8:31
 */
header('Content-type:text/html;charset=utf-8');
?>
<!doctype html>
<html>
<body>
<?php
$name='小明';
$score='78';
if(is_int($score)||is_float($score)){
    if($score>=90&&$score<=100){
        $str='A级';
    }else if($score>=80&&$score<90){
        $str='B级';
    } elseif($score>=70&&$score<80){
        $str='C级';
    }elseif($score>=60&&$score<70){
        $str='D级';
    }elseif($score>=0&&$score<60){
        $str='E级';
    }else{
        $str='学生成绩范围必须在0-100！';
    }
}else{
    $str='输入的学生成绩不是数值!';
}
echo "<h2>学生成绩等级</h2><p></p>"
?>
</body>
</html>

